TY - JOUR T1 - The Difference in the Improvement of Problem Solving Ability and Students Motivation Who Taught by Problem Based Learning and Discovery Learning A1 - Verawati, V A1 - Napitupulu, E. Elvis A1 - Rajagukguk, Waminton Y1 - 2018 PY - 2018 DA - 2018/12/08 N1 - doi: 10.12691/education-6-12-4 DO - 10.12691/education-6-12-4 T2 - American Journal of Educational Research JF - American Journal of Educational Research JO - American Journal of Educational Research SP - 1609 EP - 1617 VL - 6 IS - 12 PB - Science and Education Publishing SN - 2327-6150 M3 - doi: 10.12691/education-6-12-4 UR - http://pubs.sciepub.com/education/6/12/4 Y2 - 2018/12/08 ER -